Ah, that is good to know and might give me some flexibility with the migration to a new box. I wonder if I’d be able to Proxmox > Ubuntu/Debian VM (I believe I would need a passthrough card based on others comments for this) and then do the data transfer all on the new machine. Old SRH array > Large JBOD disk > Reformat old SRH drives with new drives for vdev/ZFS pool > Copy media back over to new pool > use large JBOD disk in old Synology as a mirror for backups… Hmmm, that is definitely a workflow I am going to explore. Thanks for the info!